/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.coders;



import com.bff.gaia.unified.sdk.values.TypeDescriptor;

import com.bff.gaia.unified.sdk.values.TypeParameter;



import java.util.Collection;

import java.util.List;



/**

 * A {@link CollectionCoder} encodes {@link Collection Collections} in the format of {@link

 * IterableLikeCoder}.

 */

public class CollectionCoder<T> extends IterableLikeCoder<T, Collection<T>> {



  public static <T> CollectionCoder<T> of(Coder<T> elemCoder) {

    return new CollectionCoder<>(elemCoder);

  }



  /////////////////////////////////////////////////////////////////////////////

  // Internal operations below here.



  /**

   * {@inheritDoc}

   *

   * @return the decoded elements directly, since {@link List} is a subtype of {@link Collection}.

   */

  @Override

  protected final Collection<T> decodeToIterable(List<T> decodedElements) {

    return decodedElements;

  }



  protected CollectionCoder(Coder<T> elemCoder) {

    super(elemCoder, "Collection");

  }



  @Override

  public TypeDescriptor<Collection<T>> getEncodedTypeDescriptor() {

    return new TypeDescriptor<Collection<T>>() {}.where(

        new TypeParameter<T>() {}, getElemCoder().getEncodedTypeDescriptor());

  }

}